HT3301 Syllabus - Handloom Weaving Technology - 2021 Regulation Anna University

HT3301 Syllabus - Handloom Weaving Technology - 2021 Regulation Anna University

HT3301	HANDLOOM WEAVING TECHNOLOGY	LTPC

3003

COURSE OBJECTIVES:

• To enable the students to understand the principles of mechanisms of handloom weaving such as primary, secondary and auxiliary motions, preparatory processes, yarn packages etc
• To enable the students to perform calculations of yarn count, reed count and heald count
• To enable the students to gain the knowledge of the principles of working of various handloom dobbies

UNIT I	WEAVING PREPARATORY PROCESS	9

Yarn packages - hanks, cones, cheeses, and spools - Characteristics and use; Essential characteristic of warp and weft, Objectives of winding and warping, peg warping, vertical warping and sectional warping; objectives and importance of sizing of cotton yarn, ingredients used in size mixture for handloom industry and their functions, various forms of sizing- hank sizing and street warp sizing; Characteristics of ideal sizing, common defects during sizing- causes and remedies

UNIT II	SHEDDING AND PICKING MECHANISM	9

Evolution of handlooms, Various parts of a handloom and their functions, types of handloomsThrow shuttle handloom, Fly shuttle pit loom and frame loom; Relationship between type of handloom and the product, passage of warp in frame loom; motions of a handloom; definitions of primary, secondary & auxiliary, motions; Types of shed formations– centre closed shed, bottom closed shed, top closed shed, open shed and semi open shed - advantages, disadvantages and shedding devices; shedding mechanism of a handloom using treadles and heald reversing motions – roller system, pulley reversing system and jack and lam rod system

UNIT III	BEAT-UP AND SECONDARY MECHANISM	9

Picking mechanism of a handloom, types of shuttles – throw shuttle, fly shuttle and roller shuttle, design and suitability; beat-up- open shed beat-up, closed shed beat up and crossed shed beat-up in handlooms, different types of reed – bamboo reed, steel reed and all metal steel reed, suitability for various fabrics; let off motion in handlooms – ratchet wheel and pawl, rope and weight, ropelever and weight motions; take up motion in handloom – poker rod, ratchet wheel & pawl; auxiliary motions of a handloom – temple motion and terry motion; handloom dobbies – lattice dobby, barrel dobby and vertical dobby

UNIT IV	YARN NUMBERING SYSTEM	9

Introduction to numbering of yarns; indirect system of numbering of yarns – New English cotton, New French, metric, worsted, woollen Yorkshire Skein, linen, spun yarn, Direct system of numbering of yarns – Denier metric, flax/ jute/ hemp, Universal system of yarn numbering – Tex and its derivatives - millitex, kilotex; Determination of conversion factors, Conversion of count of yarn -indirect to indirect, direct to direct, indirect to direct, direct to indirect systems

UNIT V	YARN COUNT CACLCULATION	9

Determination of Equivalent/Resultant count of folded yarns with and without contraction during twisting, costing of folded yarn, Average count of warp. Read Count - dents per linear space and groups of dents per linear space models, Stockport System of Reed count - relation between reed counts, number of ends per dent, ends per inch, cloth width, reed width and total number of ends, heald count calculations

TOTAL: 45 PERIODS

COURSE OUTCOMES:: Upon completion of the course, students will be able to

Upon the completion of this course the student will be able to CO1: Describe the yarn packages and the process of winding, warping and sizing CO2: Explain the various parts, motions and shedding mechanism of handloom CO3: Explain the various types of picking, beat up, let off and take up mechanism CO4: Describe the direct and indirect yarn numbering systems CO5: Explain the average count, reed count, heald count and its calculations

TEXT BOOKS:

Sriramlu P.K., Ajgaonkar D.B. & Talukdar M.K., "Weaving Machines: Mechanisms, Management", Mahajan Publishers, Ahmedabad, 1998. 2. Lord P.R. and Mohammed M.H., "Weaving – Conversion of Yarn to Fabric", Merrow Publication, 1992.

REFERENCES:

John A. Iredale “Yarn Preparation: A Hand Book”, Textile Institute, Manchester, 1992, ISBN: 1853390429 2. Ormerod A. and Sondhelm W. S., “Weaving: Technology and Operations”, Textile Institute, 1995, ISBN: 187081276X.